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Finding the Fourth Proportional to 68,771.43, 103,091.54 and 21,992.31

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Solution

The fourth proportional to 68,771.43, 103,091.54 and 21,992.31 is: 32,967.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,771.43 : 103,091.54 = 21,992.31 : x
  2. Step 2: Convert to fraction form
    68,771.43/103,091.54 = 21,992.31/x
  3. Step 3: Cross multiply
    68,771.43x = 103,091.54 × 21,992.31
  4. Step 4: Simplify right side
    68,771.43x = 2,267,220,996.10
  5. Step 5: Solve for x
    x = 2,267,220,996.10/68,771.43
  6. Step 6: Final answer
    x = 32,967.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.